Typewriter



June 20, 1933.

E. POPE 1,914,524

TYPEWRITER Filed Nov. 19, 1930 2 Sheets-Sheet 1 awvemtoz 7%. 95131014) flbtovmw E. POPE TYPEWRITER June 20, 1933.

Filed Nov. 19, 1930 2 Sheets-Sheet awve'ntoz 72 W 351 MB awe M401 Patented June 20, 1333 UNITED STATES PATENT OFFICE EDWIN POPE, OF QUEBEC, QUEBEC, CAN ADA TYPEWRITER Application filed November 19, 1930. Serial No. 496,577.

My invention relates to improved, and assembled in a suitable frame 1, which is preferably supplemental, means for actuatpreferably provided with adjusting means, ing the keys, and keybars, of conventional Such as screws 2, 2, 3, 3, whereby the aptypewriters, throu h the instrumentality ofparatus may be conveniently positioned to a separate set of finger keys bringing into properly cooperate with the typewriter ti'n- 55 play electrical apparatus to assist in the opgel keys. eration of typewriter keys and key bars. Two series of bars, 4, 4, 4, and 5, 5, 5, are

Objects of my invention are to improve pivoted, as on a rod 6, in the frame, preferm the method of operating a supplementary ably spaced by slots 7, 7, 7 in a plate 8 at finger keyboard by the utilization of electrltached to the front of the frame 1. The bars cal means to assist and complete the key 4, 4, 4 and 5, 5, also register in slots 9, 9, 9 movements selected and initiated by the opin another plate 10 attached to the front of erator; the frame.

, To employ for this purpose a single source The bars 4, 4, 4, are provided with finger of electrical energy operating a single key keys 11, 11, 11, which may be marked to cora t ati ean respond with the typewriter keys to be sev- To place this single key actuating means erally actuated through them. And these under the common control of all the finger bars 4, 4, 4 are also provided with laterally keys, so that the operation of any selected projecting flanges or arms 12, 12, 12 which key will call into play the common electrilie over the adjacent bars 5, 5, 5, so that the cal means; depression of a bar 4 carries down also a To thereby dispense with a plurality or bar 5, multiplicity of electrical operating means in- Each bar 5 is provided with a downwardvolved when separate keys call into play sepa- 1y extended member shown as consisting of rate electrical operating units; a rod 13 threaded through a block 14 on the To simplify the supplementary operatin bar 5, this threaded connection permitting apparatus so as to increase its efficiency an accurate adjustment between the rods 13 and eliminate sources of complication and de-- the typewriter keys 15, 15,15, with which rangement; they engage in operation.

To reduce the cost of construction of the A space bar 16 is carried by arms 17, 17 supplementary operating apparatus withpivoted like the bars 4, 4, 4, and 5, 5, 5, in out impairing its efliciency; the frame 1, and controlling, through an arm And to accomplish other desirable results 18 a bar 19, provided with a block 14 and as will be hereinafter pointed out. pin 13 like those on the bars 5, 5, 5, so that In the drawings Fig. 1 is a plan view of the space bar 20, of a typewriter may be op- 35 my apparatus, medial finger keys and their erated through the space bar 16, in a Way bars being omitted for clearness, some finsimilar to the operation of the typewriter ger keys of a typewriter set being shown to keys through the keys 11, 11, 11.

4 make the operation of my apparatus more A bar 23 extending across beneath all the easy to understand; Fig. 2 is a side elevabars 4, 4, 4 and 19 is carried by arms 24, 24 tion, taken as looking to the left on Fig. 1; pivoted as at 25, 26 to the frame, and is nor- Fig. 3 is an elevation taken as looking to mally held to duty by a spring 27 attached the right on Fig. 2, duplicate medial porto one of the arms 24 and fastened to the A5 tions being broken away for clearness: Fig. frame 1.

g 4 is a detail taken as on the line 4-4 of Fig. An arm 28 extends down from each bar 4 1, looking to the left: Fig. 5 is a detail taken into close proximity to the bar 23, so that deon the line 55 of Fig. 1 looking to the left. pression of any bar 4 will rock down the bar Similar parts are designated by similar 23; and a similar arm 28 extends down from w reference numerals in all the figures. one bar 17.

The operative parts of the apparatus are Another bar 30 is carried by arms 31, 31

pivoted to arms 32, 32, which, in turn are pivoted, asat 33, 33, to the frame 1, and carry an armature 34, in the field of electromagnets 35, 35, which lie in a circuit including a source of electrical energy, as battery 36. The armature is normally retracted from the magnets by a spring 37.

Plates 38, 38 extend from the frame beside the arms 31, 31, and are each provided with a cam slot 39, into which projects a pin 40 from an arm 31. Y

Each bar 5 carries an arm 43, havlng a projection 44 lying in proximity to bar 30, and adapted to engage andhold below 1t. Bar 19 also carries an arm 43.

The bar 23 lies above and in close proximity to the arms 32, 32, so that when the bar 23 is depressed by a bar 17 or 4 1t carries down also the arms 32, 32 and the bar 30 carried by them, this downwardmovement resulting in the pins 40, 40 being drawn down in the cam slots 39, 39, throwing the upper ends of the arms 31, 31 and the bar 30 over toward the arm 43 so that the bar 30 is above the projection 44 and will prevent the bar 5 from rising, until it is released.

One of the arms 24, for instance the one to the right in Fig. 1, is provided with a po nt, as 46, adapted to contact with a flat spring 47, secured to the frame 1, when the arm 24 is depressed, thus closing a circuit through the spring 47, line 48, battery 36, llne 49, coils of magnets 35, 35, line 50, and arm 24, so as to energize the magnets 35, 35', whlch will draw towards them the armature 34, depressing the free ends of arms 32, 32, pulling down the bar 30, and through it the bar 19 or 5, completing the strokeof the bar to actuate the typewriter key to perform 1ts normal function in the operation of the typewriter.

An adjusting screw 51, in an extension of frame 1, the end of which screw may register with insulation 52 on spring 47 permits the proper regulation of the gap between point 46 and spring 47.

The release of a finger key 11, by the operator, after a printing stroke, allows spring 27 to rock arms 24, 24 and bar 23 upward, breaking the contact at 46, 47, deenerglzlng the electro magnets, raising keybar 4 to its normal position, and permitting spring 37 to raise arms 32, 32, arms 31, 31, and bar 30, so that keybar 5 may be returned to its normal position by the typewriter key, as 15.

The operation of the mechanism is as follows:

The supplementary key board having been properly adjusted in reference to the typewriter key board, the operator selects and lightly presses a finger key, as 11, thus depressing a bar 4 and its companion bar 5, pressing down bar 23, and arms 24, 24, closing the electric circuit at contacts 46, 47 enerizing the magnets 35, 35 to draw toward t cm the armature 34, depressing the free as already described, breakin the circuit at contacts 46, 47, permitting t e arms 32, 32 to rock up, withdraw bar 30 from control of the key bar 5, and let that keybar be returned to normal position by the recoil of the typewriter key 15.

The short range of movement of the bars 4, 4 permits their return to normal position with marked rapidity, thus correspondingly increasing the speed with which the apparatus may be operated.

It will be seen that in my improved apparatus I employ but a single electrically actuated. unit, embracing one or'more electromagnets influencing a single armature and located in a single circuit, and that I employ this single armature to complete the printing stroke of any selected character, the initial movement only being given b the o rators touch and the printing blow being elivered by the armature quickly and forcefully and immediately followed by the automatic return of the various elements to their normal positions.

It will be understood that the number of finger keys and their cooperating elements in my supplementary apparatus may be varied to correspond with the number of typewriter key elements with which the particular typewriter to be operated through the supplementary apparatus is supplied, for the principles of operation of the supplementary apparatus are the same whether there be a larger or smaller number of typewriter keys in any particular typewriter. To avoid crowding, I have not illustrated supplementary keys for operating the typewriter shift keys. But it is 'to be understood that elements 4, 5 and 11 are provided to actuate the shift keys. Also, a single finger key 11 may be substituted for the bar 16 if that is desired; as the connections of 16 are the equivalents of 4, 5.

Furthermore the principles of my invention may be embodied directly in the typewriter itself. For it will be obvious that the typewriter finger keys may be disconnected from the type bars and made to actuate auxiliary bars like 5, 5 which, in turn may be connected to and actuate the type bars.

It is also to be understood that the particular form of embodiment of my invention is to be regarded as a typical and not an exclusive form; for details of construction may be modified, as by the use of mechanical equivalents, without departing from the spirit of my invention and the scope of my claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent of the United States is:

1. In mechanism adapted to actuate the finger keys of a conventional typewriter, the combination of selective finger key bars disposed in a common plane, a plurality of impulse bars parallel to and in the same plane as the finger key bars, alternated therewith and each initially depressible by a finger key bar, a source of electrical power, electrically driven im ulse means, and common means controlled y any of the finger key bars to initiate the action of the lmpulse bars.

2. In mechanism adapted to actuate the finger keys of a conventional t ewriter, the combination of selective finger ey bars disposed in a common plane, a plurality of impulse bars parallel to and in the same plane as the finger key bars, alternated therewith and each initially depressible by a finger key bar, a source of electrical power, electrically driven impulse means engageable with any of the impulse bars, and common means controlled by any of the finger ke bars to initiate the action of the impu se bars, the finger key bars and the impulse bars swinging on a common pivot line.

3. In mechanism adapted to actuate the finger keys of a conventional typewriter, the combination of selective finger key bars dis-' posed in a common plane and each provided with a lateral extension, a plurality of impulse bars parallel to and in the same plane as the fin r ke bars, alternated therewith and each initial depressible by the lateral extension of a finger key bar, a source of electrical power, electrically driven impulse means engageable with any of the impulse bars, and common means controlled b any of the finger key bars to initiate the action of the impu se bars.

4. In mechanism adapted to actuate the finger keys of a conventional typewriter, the combination of selective finger e bars disposed in a common plane, a p urality of impulse bars parallel to and in the same plane as the finger key bars, alternated therewith and each intially depressible by a finger ke bar, a source of electrical power, electrical y driven impulse means engageable with any of the impulse bars, and common means controlled by any of the finger key bars to initiate the action of the impu se bars, the impulse bars being provided with adjustable elements to engage the typewriter finger keys.

5. In mechanism adapted to actuate the finger keys of a conventional typewriter, the combination of selective finger e bars disposed in a common plane, a plura ity of impulse bars parallel to and in the same plane as the finger key bars, alternated therewith and each provided with a depending arm having a lateral extension, and being initially depressible by a finger lqey bar, a source of electrical power, electrically driven impulse means engageable with the extension of the depending arm of any of the impulse bars, a cam embodying element for governing the engaging movement of the impulse means, and common means controlled by any of the finger key bars to initiate the action of the impulse bars.

6. In mechanism adapted to actuate the finger keys of a conventional typewriter, the combination of selective finger key bars disposed in a common plane, a plurality of impulse bars parallel to and in the same plane as the finger key bars, alternated therewith and each initially depressible by a finger key bar, a source of electrical power, electrically driven impulse means engageable with any of the impulse bars, and common means controlled by any of the finger key bars to initiate the action of the impulse bars, the finger key bars being free to return to normal position independently of the impulse bars.

7. In mechanism adapted to actuate the finger keys of a conventional typewriter, the combination of selective finger key bars dis posed in a common plane, a plurality of impulse bars parallel to and in the same plane as the finger key bars, alternated therewith and each initially depressible by a finger key bar, a source of electrical power, electrically driven impulse means engageable with any of the impulse bars, and common means controlled by any of the finger key bars to initiate-the action of the impulse bars, the impulse bars being free to complete their impulse movements independent ly of the finger key bars.

8. In mechanism adapted to actuate the finger keys of a conventional typewriter, the combination of selective finger ey bars disposed in a common plane, a plurality of impulse bars parallel to and in the same plane as the, finger key bars, alternated therewith and each initially depressible by a finger key bar to close a switch in an electrical actuating circuit, a source of electrical power, electrically driven impulse means engageable with any of the impulse bars, and common means controlled by any of the finger key bars to initiate the action of the impulse bars.

EDWIN POPE. 

